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ROUGH WATER MATING OF ROLL-ON/ROLL-OFF SHIPS WITH BEACH DISCHARGE LIGHTERS

The purpose of the study is to determine the optimum position for the mating of the beach discharge lighter USAV Lt Col John V. D. Page and the roll-on/roll-off ship USNS Comet. Theoretical and experimental investigations of the individual ship motions ( i.e., surge, heave, sway, pitch, roll and yaw ) and the relative motions between the stern of ships ( i.e., relative surge, heave, sway and roll ) for the above mentioned two ships were carried out at zero ship speed and various sea conditions. Results for the motions were presented as a function of wavelength, wave directions and sea states. It was found that either head seas or following seas was the best position for the mating. Further, the shallow water effect on the ship motions were investigated and results were also presented. ( Author )